Roller mill



Aug. 19, 1924. nsawm M. J. MAYHEW ROLLER MILL I Filed Nov. 2'7, 1922 5 Sheets-Sheet l Aug. 19, 1924. 1,505,573

M. J. MAYHEW ROLLER MILL Filed Nov. 27,}922 5 Sheets-Sheet 2 Aug. 19' 1924.

M. J. MAYHEW ROLLER MILL 5 Shaw's-sheets Filed Nov. 27, 1922 Aug, 19 1924 M. J. MAYHEW ROLLER MILL Filed Nov. 27, 192-2 5 Sheets-Sheet 4 v I I; I v

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M. J. MAYHEW Aug. 19 19247.

ROLLER MILE Filed Nov. 27, 1922 Patented Aug. 19, 1924.

UNITED STATES oFFicE.

MARK J. MAYHEW, F OYVENSBORO, KENTUCKY, ASSIGNOR'TO' ANGLO-AFIERICAN MILL COMPANY, OF OWENSBORO, KENTUCKY, A CORPORATION OF DELAWARE. I

ROLLER ILL."

Application filed November 27, 1922. Serial No. 603,556.

T 0 all whom it may concern Be it known that 1, MARK J. MAYI-IEW,

a British subject, residing at Owens-boro,

in the county of Daviess and State of Kentucky, have invented new and usefullmprovements in Roller Mills, ofwhich the following is a specification.

The present invention relates to a selfcontained mill in which. the various crushing and reducing instrumentalities are conveniently housed in a single casing, and while the invention in its preferred form is shown used in connection with a roller corn mill, it will be understood that that it is equally well adapted for use with mills for other purposes.

A primary feature of the development consists in so positioning beneath both the break section and the reduction section of the rolls, asingle quadruple scalper which is provided with a screen or wirega-uze hav ing varying degrees of coarseness, which receives the stock asit issues fromvthe rolls, so as to separately and selectively grade the same and deliver the meal, germ, bran and grits to suitable outlets in the bottom of the mill.

Another essential feature of this invention consists in mounting a double set of be brought into varying and predetermined adjusted relation relative to a stationaryroll thus providing means which will insure the proper grinding and finenessof the stock, and permit the rolls to be readily thrown out of grinding position when not in use so as to eliminate the formation of chokes of grain on the peripheryof the rolls, and to further provide means for obtaining proper tramming and leveling of the rolls when they are brought into operative position. v

Referring to the drawings wherein is shown a preferred embodiment of my invention: a

Figure 1 is a front end view of the mill with the outer casing removed showing certain parts in section for clearness.

ing theactuating shaft for operating the movable rolls.

Figure 5 is a sectional viewtaken substan-, tially along the line 55 of Figure at.

Figure 6 is a view showing the opposed bearing ends for carrying the actuating shaft. 7

Figure 7 1s a detail view. showing the operation handle for-varying the adjustment of the movable rolls.

Figure '8 is a. diagrammatic view showing,

the routingof the stock.

Referring to'the drawings, wherein like numerals indicate like parts in the various views, 10 denotes the casing of the mill whichm'ay be'of any desired design and construction, and which is provided with the side frame members ll and 12"to which are secured the stationarybearings 13 and the movable bearings 14.

Journalledin the bearings 13 is the shaft 15, on which is secured a sectional roll 16 preferably provided lwith a coarse section 17' and a fine section 18. A shaft 19 is similarly journalled' in the bearing 141- "and carries a sectional roll 20 provided with a coarse section 21 and a fine section 22 which corresponds to their opposed sections on the roll 16.

The sections 1'? and 21 constitute the break sections of the mill, while the sections 18 and-22 form the reduction section.

The movable bearings 1 1 are fulcrumed or supported on the side frames by the brackets 23 each of which have extending through an opening in their uppersend a threadedbushing 2a, through which extends the threaded bolt 25 that supports the movable bearings 141- at one ,end above the shaft 19.

Secured tothebolt 25 is a spiralspring 26, which extends within a recess formed in the upper portion of the bearing 14:, and

is tensionally adjusted on the bolt 2-1 by the nut 27.

It will be seen that by the adjusting of the nut 27 relative to the bearing 14, the

tension of the spring 26 will be varied so as to permit a slight yield of the roll 16 when any foreign matter accidentally is allowed to enter the mill, thus eliminating the possibility of the parts becoming jammed or injured.

The opposite end of the bolt is provided with a locking hand wheel 28 which tends to prevent the bushing 24 from moving, while a stop 29 on the bearing 14 maintains the bolt 25 in fixed position thereon.

A hand wheel 30 is mounted on the bushing 23 and is adapted to impart rotation thereto when the locking wheel 28 is in the released position.

An actuating shaft 31 extends through suitable bushings 32 secured to the openings in the side frames 11 and 12 respectively by the bolts 33, as shown. The shaft 31 is provided at its ends with reduced sections 34 and 35 which project beyond the side frames and have their central axes off-centered with respect to the axis of the shaft 31. To the members 34 and 35 are secured the lower portion of the swinging bearings 14, while preferably to the member 35 adjacent the bearing 14 there is connected an operating handle 36, which is adapted upon being actuated to turn the shaft 31 eccentrically relative to the movable bearing 14, and thus move the roller 19 to or away from the roller 16, as desired. The handle 36 intermediate its ends is provided with an elongated slot 37, which'is adapted to receive a locking hand wheel 38, that threadedly engages a recess formed in the depending arm 39 of one of the brackets 23, as shown in Figure 5.

It will be apparent that upon the moving of the handle 36 from the full line to the dotted line position shown in Figure 7, the movable bearings 14, together with the roll 20'is brought into any desired position relative to the roll .16," and resiliently maintained therein by the locking wheel 39 and the spring 26.

Furthermore, by the adjusting means i above provided, the rolls are at all times maintained in proper parallel relation with respect to each other so as to secure an effective tramming and leveling of the rolls irrespective of the coarseness or fineness of the material to be acted upon.

The stock is delivered throughan opening 40 in the top of the mill to a feed hopper 41 where, by means of the feed roller 42, it is evenly distributed as shown in Figure 3, t0 the break sections 17 and 21 of the rolls.

After being preliminarily acted upon by these rolls the stock is conducted by a fall board 43 to a quadruple vibrating scalper 44 which is provided with wire screen sections 45, 46, 47, and 48, having meshes which are graduated in coarseness from the forward to the rear end, as shown in Figure 8. While the sections45 and 47 are shown of fine mesh and the sections 46 and 48 as being coarse, it is to be understood that any graduation or increase in the coarseness of the meshes may be made and that the sections may be interchanged depending upon the material with which the mill is to be used. The scalper 44 is preferably vibrated by means of the shaft 44 which is connected to the main drive wheel by the belt 43, as shown in Figure 1. e

As the stock from the break rolls 17 and 21 falls on the section 45 of the vibrating scalper 44, the meal passes through this fine screen into a compartment 49 and is delivered through the opening 50 to a suitable meal spout 51. The grits from the stock escapes throughthe coarse section 46 to the compartment 52, and delivers through an opening 53 to a grit spout 54. The overtails are conducted to the bucket elevator 55 and delivered by the spout 56 to the further end of the hopper 41 where it is carried by the feed roller 42 to the reduction sections 18 and 22 of the rolls. From these sections the stock falls on the screen 47, where the meal is allowed to pass through into the compartment 49 and mixes with the meal from the section 45. From this compartment the meal, as previously stated, is conducted through the opening 50 to the spout 51 and carried to any suitable point of delivery.

As the coarse stock from the section 47 is sieved to the section 48 of the scalper, the germ is allowed to pass through this section and fall into a compartment 56 where it is conducted through the opening 57 to a germ spout 58. The overtails' are carried by the fall board 59 as shown in Figure 2'to a bran spout 6O conveniently located at the forward end of the mill.

Thus, it will be seen that by this particular construction, the stock may be separately and selectively delivered to five different outlets, preferably arranged in the bottom of the casing, at substantially the same time.

The rolls 16 and 20 are suitably connected to any common form of drive mechanismpositioned on the outside of the casing and are arranged to rotate with different peripheral speeds in the direction of the arrows shown in Figure 8. Preferably the roll 16 will move at a slower peripheral speed than, the roll 20 so as to insure the eflicient grinding of the stock as it passes through the mill.

It will be seen that by the present construction'the handling of the stock from its initial breaking to its'final reduction is reduced to aminimum, and, furthermore, that when the mill is used for grinding corn, means are provided for separately and selectively obtaining table meal, breakfast grits, germ feed, and bran, while by reason of the interchangeable features of the sieves, eight different products may be obtained in a single operation, 1

As shown in Figure 8, the operation of the mill is as follows:

The corn is initially crushed by being passed through the break rolls 17 and 21, from which it falls on the fine section 45 of the screen, which allows the meal to sift through and be delivered to the meal spout 51. The grits which fall through the coarse section 46 are conducted to the spouts 54, while the overtails are delivered by the bucket elevator 54 to the reduction rolls l8 and 20, where the stock is again subjected to further reduction and is delivered to the fine section 47, which allows the meal to escape therethrough to the spout 51, previously referred to.

The stock that is conducted to the forward end of the scalper and which is sufficiently fine to escape through the section 48, is carried through the germ spout 58, while the bran tails over the scalper to the spout 60.

It is to be understood that such minor details of construction and operation as fall within the purview of a mechanic may be made without departing from the spirit of this invention and the scope of -what is claimed.

I claim:

1. In a composite mill, the combination of a pair of shafts having a pair of break rolls and a pair of reduction rolls mounted thereon, a quadruple scalper beneath said rolls, means on said scalper for grading the stock and selectively conducting it to suitable outlets, and means for conveying the stock from the break rolls to the reduction rolls.

2. In a composite mill the combination of a pair of shafts having a pair of breakrolls and a pair of reduction rolls mounted thereon, a quadruple scalper beneath said rolls, provided withscreen sections of varying de grees of coarseness, and means for convey.

ing stock from the break rolls to the reduction rolls.

3. In a composite mill, the combination of a pair of shafts having a pair of break rolls and a pair of reduction rolls secured thereto, a quadruple scalper beneath said rolls separately to suitable outlets, and means for delivering the overtails from the break rolls to the reduction rolls.

4. In a'composite mill the combination of a pair of shafts having a pair of break rolls and a pair of reduction rolls mounted thereon, a quadruple scalper beneath said rolls provided with screen sections of varying degrees of coarseness, means for grading the stock on said scalper, means for conducting the said graded stock to separate outlets in the bottom of'said machine, and a bucket elevator delivering the overtails from the break rolls to'the reduction rolls.

5. In a com'posite mill, the combination of a pair of shafts having a pair of break rolls and apair of reduction rolls mountedthereon, a quadruple scalper beneath said rolls having screen sections of increasing coarseness, means in said scalper for grading the stock,meansfor conducting the said graded stock to separate outlets, and means for delivering the overtails from the break rolls tothe reduction rolls.

6. In a composite mill the combination of a pair of shafts having a pair of break tion, a pair of brake rolls, a pair of reduc-- tion rolls, and a quadruple scalper having substantially parallel coarse sections and substantially parallel fine sections, positioned beneath said rolls for sifting the stock as it issues from said rolls.

In testimony whereof I have hereunto set" my hand.

MARK J. MAYHEVV. 

